CVE-2021-22928 : Security Advisory and Response
Learn about CVE-2021-22928 impacting Citrix Virtual Apps and Desktops, allowing users to escalate privilege levels on Windows VDAs. Find mitigation steps and long-term security practices here.
A vulnerability has been identified in Citrix Virtual Apps and Desktops that could, if exploited, allow a user of a Windows VDA to escalate their privilege level to SYSTEM.
Understanding CVE-2021-22928
This CVE identifies a vulnerability in Citrix Virtual Apps and Desktops that allows privilege escalation on Windows Virtual Delivery Agents (VDAs) when specific Citrix components are present.
What is CVE-2021-22928?
A flaw in Citrix Virtual Apps and Desktops enables users with Citrix Profile Management or Citrix Profile Management WMI Plugin installed on a Windows VDA to elevate their privileges to SYSTEM level.
The Impact of CVE-2021-22928
This vulnerability could be exploited by attackers to gain elevated privileges on affected systems, potentially leading to unauthorized access and control over sensitive information.
Technical Details of CVE-2021-22928
This section covers the specific technical details of the CVE.
Vulnerability Description
The vulnerability in Citrix Virtual Apps and Desktops allows users to increase their privilege level to SYSTEM on Windows VDAs with the mentioned Citrix components installed.
Affected Systems and Versions
The affected products include Citrix Virtual Apps and Desktops with versions 2106 HF1, 1912LTSR CU3 HF1, and 7.15LTSR CU7 HF1.
Exploitation Mechanism
By leveraging the identified vulnerability, threat actors can exploit the flaw in Citrix Virtual Apps and Desktops to escalate their privileges on Windows VDAs.
Mitigation and Prevention
Protecting systems from CVE-2021-22928 requires immediate action and long-term security measures.
Immediate Steps to Take
Organizations should apply relevant patches and security updates provided by Citrix to mitigate the vulnerability. Additionally, monitor system activities for any signs of unauthorized privilege escalation.
Long-Term Security Practices
It is essential to regularly update Citrix Virtual Apps and Desktops to the latest versions, implement least privilege access controls, and conduct security assessments to identify and address vulnerabilities proactively.
Patching and Updates
Stay current with security patches and updates released by Citrix for Citrix Virtual Apps and Desktops to safeguard systems against known vulnerabilities.